5-Cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylic acid
3-Cyano-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-5-methanol
4-Cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylic acid
6-Cyano-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-methanol